{"api_version":"1","generated_at":"2026-08-19T11:45:09+00:00","cve":"CVE-2026-49420","urls":{"html":"https://cve.report/CVE-2026-49420","api":"https://cve.report/api/cve/CVE-2026-49420.json","docs":"https://cve.report/api","cve_org":"https://www.cve.org/CVERecord?id=CVE-2026-49420","nvd":"https://nvd.nist.gov/vuln/detail/CVE-2026-49420"},"summary":{"title":"Buffer overflow in libalias RTSP handler","description":"The RTSP handler in libalias rewrote outgoing packets into a fixed-length stack buffer without checking whether the rewritten data fit in the buffer, or whether the result fit back in the original packet.\n\nA host sending crafted RTSP traffic from inside a NAT gateway using libalias can overflow a stack buffer, potentially achieving remote code execution in the kernel (when using ipfw(4) NAT) or in the natd(8) process (which generally runs as the root user).","state":"PUBLISHED","assigner":"freebsd","published_at":"2026-08-19 06:17:40","updated_at":"2026-08-19 06:17:40"},"problem_types":["CWE-121","CWE-121 CWE-121: Stack-based Buffer Overflow"],"metrics":[],"references":[{"url":"https://security.freebsd.org/advisories/FreeBSD-SA-26:41.libalias.asc","name":"https://security.freebsd.org/advisories/FreeBSD-SA-26:41.libalias.asc","refsource":"secteam@freebsd.org","tags":[],"title":"","mime":"","httpstatus":"","archivestatus":"0"},{"url":"https://www.cve.org/CVERecord?id=CVE-2026-49420","name":"CVE Program record","refsource":"CVE.ORG","tags":["canonical"]},{"url":"https://nvd.nist.gov/vuln/detail/CVE-2026-49420","name":"NVD vulnerability detail","refsource":"NVD","tags":["canonical","analysis"]}],"affected":[{"source":"CNA","vendor":"FreeBSD","product":"FreeBSD","version":"affected 15.1-RELEASE p1 release","platforms":[]},{"source":"CNA","vendor":"FreeBSD","product":"FreeBSD","version":"affected 15.0-RELEASE p11 release","platforms":[]},{"source":"CNA","vendor":"FreeBSD","product":"FreeBSD","version":"affected 14.4-RELEASE p7 release","platforms":[]},{"source":"CNA","vendor":"FreeBSD","product":"FreeBSD","version":"affected 14.3-RELEASE p16 release","platforms":[]}],"timeline":[],"solutions":[],"workarounds":[],"exploits":[],"credits":[{"source":"CNA","value":"Atuin - Automated Vulnerability Discovery Engine, Tianchu Chen of Tencent Xuanwu Lab","lang":"en"},{"source":"CNA","value":"UC Berkeley Antiproof","lang":"en"},{"source":"CNA","value":"Stanislav Fort of Aisle Research","lang":"en"}],"nvd_cpes":[],"vendor_comments":[],"enrichments":{"kev":null,"epss":null,"legacy_qids":[]},"source_records":{"cve_program":{"containers":{"cna":{"affected":[{"defaultStatus":"unknown","modules":["libalias"],"product":"FreeBSD","vendor":"FreeBSD","versions":[{"lessThan":"p1","status":"affected","version":"15.1-RELEASE","versionType":"release"},{"lessThan":"p11","status":"affected","version":"15.0-RELEASE","versionType":"release"},{"lessThan":"p7","status":"affected","version":"14.4-RELEASE","versionType":"release"},{"lessThan":"p16","status":"affected","version":"14.3-RELEASE","versionType":"release"}]}],"credits":[{"lang":"en","type":"finder","value":"Atuin - Automated Vulnerability Discovery Engine, Tianchu Chen of Tencent Xuanwu Lab"},{"lang":"en","type":"finder","value":"UC Berkeley Antiproof"},{"lang":"en","type":"finder","value":"Stanislav Fort of Aisle Research"}],"datePublic":"2026-06-30T20:00:00.000Z","descriptions":[{"lang":"en","value":"The RTSP handler in libalias rewrote outgoing packets into a fixed-length stack buffer without checking whether the rewritten data fit in the buffer, or whether the result fit back in the original packet.\n\nA host sending crafted RTSP traffic from inside a NAT gateway using libalias can overflow a stack buffer, potentially achieving remote code execution in the kernel (when using ipfw(4) NAT) or in the natd(8) process (which generally runs as the root user)."}],"problemTypes":[{"descriptions":[{"cweId":"CWE-121","description":"CWE-121: Stack-based Buffer Overflow","lang":"en","type":"CWE"}]}],"providerMetadata":{"dateUpdated":"2026-08-19T05:20:00.559Z","orgId":"63664ac6-956c-4cba-a5d0-f46076e16109","shortName":"freebsd"},"references":[{"tags":["vendor-advisory"],"url":"https://security.freebsd.org/advisories/FreeBSD-SA-26:41.libalias.asc"}],"title":"Buffer overflow in libalias RTSP handler","x_generator":{"engine":"cvelib 1.8.0"}}},"cveMetadata":{"assignerOrgId":"63664ac6-956c-4cba-a5d0-f46076e16109","assignerShortName":"freebsd","cveId":"CVE-2026-49420","datePublished":"2026-08-19T05:20:00.559Z","dateReserved":"2026-05-29T20:24:28.616Z","dateUpdated":"2026-08-19T05:20:00.559Z","state":"PUBLISHED"},"dataType":"CVE_RECORD","dataVersion":"5.2"},"nvd":{"publishedDate":"2026-08-19 06:17:40","lastModifiedDate":"2026-08-19 06:17:40","problem_types":["CWE-121","CWE-121 CWE-121: Stack-based Buffer Overflow"],"metrics":[],"configurations":[]},"legacy_mitre":{"record":{"CveYear":"2026","CveId":"49420","Ordinal":"1","Title":"Buffer overflow in libalias RTSP handler","CVE":"CVE-2026-49420","Year":"2026"},"notes":[{"CveYear":"2026","CveId":"49420","Ordinal":"1","NoteData":"The RTSP handler in libalias rewrote outgoing packets into a fixed-length stack buffer without checking whether the rewritten data fit in the buffer, or whether the result fit back in the original packet.\n\nA host sending crafted RTSP traffic from inside a NAT gateway using libalias can overflow a stack buffer, potentially achieving remote code execution in the kernel (when using ipfw(4) NAT) or in the natd(8) process (which generally runs as the root user).","Type":"Description","Title":"Buffer overflow in libalias RTSP handler"}]}}}